Me and jsalin have written “ipxgw” which acts as a gateway between real IPX network and DOSBox clients. It tunnels IPX traffic to UDP and back.
https://github.com/zouppen/ipxgw
It has been tested with DOOM and Death Rally but should work with any IPX application. Depending on your IPX stack you may need to add “-r” command-line switch to use Novell’s raw IPX stack instead of LLC encapsulation.
Also, I have successfully used SSH tap tunnels and bridging to connect multiple vintage computers to the same Ethernet broadcast domain. Ipxgw and layer 2 tunneling can be combined; players on real hardware can be tunneled and DOSBox users can join the same game via ipxgw.
Fight the loneliness with this one 🙂